[VHFcontesting] impedance transformer

[David Pruett]

crawfish wrote:
> There was a company called ZD Engineering(W8ZD) that made them for
> 2,222,432, and 1296.I "Googled" it and didn't find a company web page. There
> is info on how to make the matching transformers on the Repeater Building
> page by W3KKC.I have used it on 6 and didn't use transformers. I would on 2
> and above.
>                                    Joe W4AAB
> ----- Original Message -----
> From: "Ed Stallman" <n5blz at ev1.net>
> To: <vhfcontesting at contesting.com>
> Sent: Saturday, July 22, 2006 3:14 PM
> Subject: [VHFcontesting] impedance transformer
>
>   
>> Hello Group, I ran two length of 3/4 inch 75 ohm CATV cable 200 foot each
>> to my newly installed tower. one each for 6 and 2M !  What I'm looking for
>> is an impedance transformer to match my radio/antenna, I believe a 62 ohm
>> transformer. I remember seeing these somewhere made from copper water pipe, I think they were 1/4 WL?  I've searched on the internet with no luck! can someone point me in the right direction with a URL or publication, ARRL VHF book. even the formula would be helpful for knowing the outside and inside diameter of the tubing.
>>
>> Thanks Ed N5BLZ
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>>
>>     
Group,

ZD Engineering was run by Paul Darwactor, W8ZD out of Findlay, OH.  Not 
to put words in his mouth, but I don't think he is making matching 
transformers any more.  (I used to see his display every year at the 
Findlay Hamfest, but not recently.)  You might try contacting him directly.

Note to AA1YN: What is "felicity factor"?

Dave/K8CC